Add project files.

Assets/Cryville/Common/FileStringAttribute.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace Cryville.Common {
+	public class FileStringAttribute : Attribute {
+		private readonly string filter;
+
+		public string[] Filter {
+			get {
+				return filter.Split('|');
+			}
+		}
+
+		public FileStringAttribute(string ext) {
+			filter = ext;
+		}
+	}
+}